<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>ImageFullScreen</title>
    <style>
        html,body{
            margin: 0px;
            padding: 0px;
            height: 100%;
            overflow: hidden;
        }
        .context{
            height: 100%;
            overflow: hidden; 
        }
    </style>
</head>
<body>
    <div class="context">
        <img src="https://s2.ax1x.com/2019/05/13/E5V2md.png" style="width: 100%;height: 100%;" width="100%" height="100%">
    </div>  
</body>
</html>